Understanding Collets: Types and Applications

Collets are a type of tool used in machine tools, such as lathes and milling machines, to hold and position workpieces during machining operations. They are typically made of metal and have a tapered or threaded interior surface that grips the workpiece. Collets are available in various sizes and styles to accommodate different workpiece dimensions and materials.

Collets can be classified into two main types:

1. Shrink fit collets: These collets have a tapered interior surface that shrinks onto the workpiece, creating a snug fit to hold it in place. Shrink fit collets are commonly used for precision machining operations where high accuracy is required.
2. Expansion fit collets: These collets have a threaded interior surface that expands to grip the workpiece when tightened. Expansion fit collets are commonly used for larger workpieces and for operations that require more force to hold the workpiece in place.

Collets are an essential component of machine tools, as they enable the accurate and precise machining of workpieces. They are widely used in various industries, including aerospace, automotive, and medical device manufacturing, among others.